
html{
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-style: sans-serif;
}
body{
    font-family: sans-serif;
    margin: 0;
    background-color: grey;
}
#login{
    position: absolute;
    top: 45%;
    left:50%;
    margin: -200px 0 0 -200px;
    width: 500px;
    height: 500px;
    background-color:#F0F0F0;
     border-radius: 10px;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    -o-border-radius: 10px;
}
#login h1{
    color: black;
    text-shadow:0 0 10px;
    letter-spacing: 1px;
    text-align: center;
}
h1{
    font-size: 2em;
    margin: 0.67em 0;
}

h2{
    margin-left:110px;
}
input{
    width: 278px;
    height: 18px;
    margin-bottom: 10px;
    padding: 10px;
    font-size: 13px;
    color: black;
    text-shadow:1px 1px 1px;
    border-top: 1px solid #312E3D;
    border-left: 1px solid #312E3D;
    border-right: 1px solid #312E3D;
    border-bottom: 1px solid #56536A;
    border-radius: 4px;
    background-color: white;
    margin-left:110px;

}
.but{
    width: 100px;
    min-height: 20px;
    display: block;
    background-color: #4a77d4;
    border: 1px solid #3762bc;
    color: #fff;
    padding: 9px 14px;
    font-size: 15px;
    line-height: normal;
    border-radius: 5px;
    margin: 0;
    margin-left:200px;
}


 /* 自定义样式 */
        body {
            background-color: #f8f9fa;
        }
        .login-container {
            max-width: 400px;
            height: 100%;
            margin: 100px auto;
            background-color: #fff;
            padding: 10px;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        .login-container h1 {
            text-align: center;
            margin-bottom: 10px;
            margin-top: 0px;
        }
        .login-container img {
            display: block;
            margin: 0 auto 20px;
            width: 80px;
            border-radius: 50%;
        }
        .login-container .form-label {
            font-weight: bold;
            height: 30px;
            width: 80px;
        }
        .login-container .form-control {
            margin-bottom: 15px;
            border-radius: 5px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            width: 200px;
            height: 25px;
            margin-left: 20px;
        }
        .login-container .btn {
            width: 100%;
            padding: 10px;
            font-size: 16px;
        }
        .btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}
        .mb-3{
            width: 300px;
            height: 50px;
            display: flex;
        }
        .form{
        width: 300px;
        height: 150px;

        margin: 0 auto;
        margin-bottom: 30px;
        }
